Sensitized-film holder for x-ray photography



.Apr. 3, 1923.

1. A. HEIDBRINK.

SENSITIZED FILM HOLDER FOR X-RAY PHOTOGRAPHY. FILED APILZI. 1921.

" flail.

' INVEN'TOR: JAY A. fie/03mm:

WWM W Patented Apr. 3, 1923.

JAY A. HEIDBRINK, OF MINNEAPOLIS, MINNESOTA.

SENSITIZED-FILM HOLDER FOR X-RAY PHOTOGRAPHY.

Application filed April 21, 1921.

To all whom it may concern:

Be it known that I, JAY A. HEIDBRINK, a citizen of the United States, residing at Minneapolis, in the county of-Hennepin and State of Minnesota, have invented certain new and useful Improvements in sensitized- Film Holders for X-Ray Photography, of which the following is a specification.

My invention relates to sensitized film holders for X-ray photography. An object is to provide a device of this character by means of which the sensitized film may properly be held in the mouth of a patient while the operator is taking an X-ray photograph of the patients teeth.

The full objects and advantages of my invention will appear in connection with the detailed description, and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings,Fig. 1 is a plan view of my device showing the position in which it is located when placed in the mouth of a patient. Fig. 2 is a side elevational view of the device. Fig. 3 is a view in section on the line 3-3 of Fig. 1. Fig. 4 is a view in section on the line 44 of Fig. 2. Fig. 5 is a front elevational view.

Referring to the construction shown in the drawings, the numeral 10 designates a rectangular block preferably of aluminum upon which is placed a sleeve 12 of resilient material such as rubber. Secured in the rear wall of the block 10 so as to project therefrom, are a pair of guide pins 14 and 16 and a screw threaded stud 18. A clamping member 20 preferably of aluminum is provided with holes 22 and 24 in which the pins 14: and 16 are adapted to slide. Swiveled within an opening in the member 20 is an internally threaded sleeve 26, the threads of which are constructed to properly engage the threads of the stud. The sleeve 26 is provided with a knurled knob 28 by means of which it may be rotated. The projecting end of the clamping member 20 is curved at 30 for a purpose which will presently appear.

In use, a sensitized film Fupon which the X-ray negative is to be made, is clamped Serial No. 463,420.

firmly hold the film in place. The device a is placed in the mouth of the patient so that the film F will lie back of the teeth which are to be photographed, the line of the teeth being represented in Fig. 1 by the dotted lines T. lVhile the exposure is being made, the patient bites upon the rubber sleeve 12 whereby the film is held in place in the mouth. The curved edge 30 of the clamping member permits the film to bend back gradually within the mouth without liability of its being cracked or broken. When the exposure has been made, the device is removed from the mouth, and the negative may be readily released upon turning the knob 28 in the reverse direction. The member 20 is preferably made of aluminum since this produces only a light spot instead of a dark spot on the negative.

I claim:

1. A sensitized film' holder for X-ray photography comprising a block having a resilient surface for engagement by the teeth of a patient, a clamping member, and cooperating screw-threaded members carried by said block and clamping member whereby they may be forced toward each other to clamp the film between them.

2. A sensitized film holder for X-ray photography comprising a block, a sleeve of resilient material around said block for engagement by the teeth of a patient, a clamping member, a threaded stud projecting from said block, an internally threaded sleeve swiveled in said clamping member, the threads of which cooperate with the threads of said stud, and a knob onsaid sleeve whereby the latter may be turned to force said block and clamping member toward each other to clamp the film between them.

3. A sensitized film holder for X-ray photography comprising a block, a sleeve of resilient material around said block for engagement by the teeth of a patient, a clamping member, guide pins carried by one of said elements and adapted to slidably engage holes in the other of said elements, a threaded stud projecting from said block, an internally threaded sleeve swiveled in said clamping member, the threads of which 00- operate with the threads of said stud and a knob on said sleeve whereby the latter film between them.

In testimony whereof I hereunto afiix my signature.

JAY A. HEIDBRINK. 

